Template-assisted synthesis of mesoporous magnetic nanocomposite particles

被引：161

作者：

Wu, PG ^{[1
]}

Zhu, JH

Xu, ZH

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada

[2] S China Normal Univ, Dept Chem, Guangzhou 510631, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2004年 / 14卷 / 04期

关键词：

D O I：

10.1002/adfm.200305455

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new concept is proposed to synthesize mesoporous magnetic nanocomposite particles of great scientific and technological importance. Mesoporous silica coatings were created on micrometer-sized magnetite (Fe3O4) particles using cetyltrimethylammonium chloride micelles as molecular templates. The characterization by transmission electron microscopy (TEM), nitrogen adsorption-desorption, diffuse-reflectance Fourier-transform infrared spectroscopy, and zeta-potential measurements confirmed the deposition of mesoporous silica thin layers on the magnetite particles. The synthesized particles showed a drastic increase in specific surface area with an average pore size of 2.5 nm. The coating material showed a negligible effect on the saturation magnetization of the original particles that were fully protected by silica coatings. The synthesized mesoporous magnetic nanocomposite particles have a wide range, of applications in toxin removal, waste remediation, catalysis, reactive sorbents, and biological cell separations.

引用

页码：345 / 351

页数：7

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